Stiff gear selections and slipping clutch

[blaze_away]

I've got a couple of problem symptoms on my Chim at the moment.

Firstly the clutch began to slip a little about 2-300 miles ago, not severe except when full beans given in 3rd/4th the clutch would slip a little.

Now also selecting 1st gear engine running has become stiffer than before.

What I'm puzzled about is the clutch bite point is good, ie quite high, ie I have a lot of clutch.

Question is what do the symptoms elude too ?

New clutch plate needed ? (due to it being worn down or oiled up)
New Driven plate needed ? (due to scored/worn face or weak springs)
New Master/slave cylinder ? (poor sealing/leakage)